Navigation Links
Passive smoking link to dementia

Researchers from the Peninsula Medical School, the University of Cambridge and the University of Michigan have published the results of the first large-scale study to indicate that second-hand smoke exposure could lead to dementia and other neurological problems.

The results will be published by the BMJ online on Friday 13th February 2009.

Research has already identified possible links between active smoking and cognitive impairment, and previous findings have suggested exposure to second-hand smoke is linked to poor cognitive performance in children and adolescents. However, this is the first study of its kind to link second-hand smoke exposure to cognitive impairment in adult non-smokers.

The research team examined saliva samples from almost 5000 non-smoking adults over the age of 50, using data from the 1998, 1999 and 2001 waves of the Health Survey and England. The participants subsequently took part in the English Longitudinal Study of Ageing.

The saliva samples were tested for cotinine, a product of nicotine that remains in the saliva for about 25 hours after exposure to second-hand smoke. Those who took part in the study also provided a detailed smoking history, and those who had never smoked, or who were previous smokers, were assessed separately.

Established neuropsychological tests were used to assess brain function and cognitive impairment. These focused on memory function, numeracy and verbal fluency. The test results were added together to provide a global score for cognitive function. Those whose scores were in the lowest 10 per cent were identified as suffering from cognitive impairment.

The researchers believe that the link between second-hand smoke and cognitive impairment could be explained by the fact that heart disease increases the risk of developing dementia, and that exposure to second-hand smoke is known to cause heart disease.

Dr. Iain Lang from the Peninsula Medical School, who worked on the study, commented: "This is the first time that anyone has used biological measures of exposure to second-hand smoke to show that passive smoking is bad for the human brain. While the ban on smoking in public places has gone some way to mitigate this problem, there is still a risk from smoking at home. We hope that our findings will encourage smokers to change their behaviour in order to reduce the risk to others."

He added, "These findings are of enormous public health importance for two reasons. First, a lot of people smoke cigarettes and it's important that they are fully aware of the harm they do to themselves, and others, by smoking. Second, the rapidly growing numbers of older people in the population, and the escalating cost of caring for people with dementia and related problems, mean that it's crucial to identify and take action on factors that can reduce the risk of developing cognitive problems. Encouraging people to quit smoking or not to take it up in the first place may be one way to achieve this."


Contact: Andrew Gould
The Peninsula College of Medicine and Dentistry

Related medicine news :

1. Dartmouth research reveals passive learning imprints on the brain just like active learning
2. Passive smoking increases sleep disturbance among pregnant women
3. First brain study reveals benefits of exercise on quitting smoking
4. Effects of smoking linked to accelerated aging protein
5. Smoking-Low Birth Weight Link Explained in Part
6. Heavy Smoking as Teenager Might Add Pounds Later
7. UC Davis study links smoking with most male cancer deaths
8. Walmart Offers $9 Smoking Cessation Starter Pack
9. Nicotine gum effective for gradual smoking reduction and cessation
10. Smoking during pregnancy fosters aggression in children
11. Stop Smoking in Three Sessions
Post Your Comments:
(Date:12/1/2015)... ... December 01, 2015 , ... Califia Farms , one of the ... bottle has won top honors in Beverage World Magazine’s Global Packaging Design Awards, taking ... it has been selected as a 2015 U.S.A. Taste Champion in the American Masters ...
(Date:12/1/2015)... ... December 01, 2015 , ... December ... the expansion of the company’s growing product line of food safety and seafood ... and Sockeye (Oncorhynchus nerka) – allow InstantLabs to offer fast, reliable species identification ...
(Date:12/1/2015)... ... December 01, 2015 , ... ... have been lifted as IMAGE Information Systems launches MED-TAB™ -- the world’s first ... Annual Meeting from November 29 to December 4, 2015. , MED-TAB is ...
(Date:12/1/2015)... ... December 01, 2015 , ... ... is everything. That is why Hollister Incorporated has launched the VaPro Plus Pocket™ ... next product in the VaPro touch free catheter portfolio,” said Michael Gresavage, Vice ...
(Date:12/1/2015)... ... 01, 2015 , ... McLean, VA., December 1, 2015 - ... per sprint agile development contract to support the National Geospatial-Intelligence Agency's (NGA) IT ... software engineering, infrastructure, as well as operations and sustainment support to the NGA’s ...
Breaking Medicine News(10 mins):
(Date:12/1/2015)... and PITTSBURGH , Dec. ... announced that it expects to be the first to ... funded by international donors, TLE400 (Tenofovir Disoproxyl Fumarate 300 ... for $99 per patient, per year. Mylan partnered with ... The significantly reduced price could generate savings of tens ...
(Date:12/1/2015)... Dec. 1, 2015  Six months of adjunctive metformin therapy ... 1 diabetes, according to new research from T1D Exchange ... may have a beneficial effect on measures of obesity, including ... of the Journal of the American Medical Association , ... effect of metformin on overweight and obese adolescents with type ...
(Date:12/1/2015)... 2015 ... of the "2016 Europe Enteric ... Coli, Enterovirus, Rhinovirus, Rotavirus, Salmonella, Shigella, ... offering. --> ) ... "2016 Europe Enteric Disease Testing ...
Breaking Medicine Technology: